2. Scientists unearth world's largest fish: As far as discoveries go, this one is pretty astounding on three counts: It came about by chance, expanded our knowledge of "gigantism," and revealed the world's largest fish.

3. Hot find in Norway: An ancient sweater: Thanks to melting snow in the Norwegian mountains, archaeologists have uncovered some pretty cool artifacts—including a really well-worn tunic more than 1,600 years old. Even better, it appears to be a hand-me down.